Siddha medicine: An ancient system of medicine prevalent in South India. The word Siddha comes from the Tamil word for perfection. In Siddha medicine, the individual is a microcosm of the universe. The human body consists of the five primordial elements - earth, water, fire, air and space, the three humours-vatha, pitta and kapha and seven physical constituents. Food is the basic building material of the human body and gets processed into humours, tissues and wastes. The equilibrium of humours is considered as health and its disturbance or imbalance leads to a diseased state. There is equal emphasis on the body, mind and spirit and strives to restore the innate harmony of the individual. Treatment is aimed at restoring balance to the mind-body system. Diet, lifestyle, yoga and meditation play a major role not only in maintaining health but also in curing diseases.